An another has 1200 pollen grains. How many PMCs must have been there to produce them?

Options

A. 1200
B. 300
C. 150
D. 2400

Explanation

To determine how many pollen mother cells (PMCs) are needed to produce 1200 pollen grains, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of PMCs**:
- Pollen mother cells (PMCs) are diploid cells that undergo meiosis to produce pollen grains. Each PMC produces four haploid pollen grains.

2. **Establish the Relationship**:
- From one PMC, we get 4 pollen grains after meiosis. This means that to find out how many PMCs are needed for a certain number of pollen grains, we can use the formula:
\[ \text{Number of PMCs} = \frac{\text{Total Pollen Grains}}{4} \]

3. **Calculate the Number of PMCs**:
- Given that there are 1200 pollen grains, we can substitute this value into the formula:
\[ \text{Number of PMCs} = \frac{1200}{4} = 300 \]

4. **Conclusion**:
- Therefore, to produce 1200 pollen grains, there must have been 300 pollen mother cells (PMCs).

### Final Answer:
The number of PMCs needed to produce 1200 pollen grains is **300**.

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